/*
 * MIT License
 *
 * Copyright (c) Microsoft Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

using System;
using System.Threading;
using System.Threading.Tasks;

namespace Microsoft.Playwright.Helpers;

internal class TaskQueue : IDisposable
{
    private readonly SemaphoreSlim _semaphore;
    private bool _disposed;

    internal TaskQueue() => _semaphore = new(1, 1);

    public void Dispose()
    {
        _disposed = true;
        _semaphore.Dispose();
    }

    internal async Task EnqueueAsync(Func<Task> taskGenerator)
    {
        await _semaphore.WaitAsync().ConfigureAwait(false);
        try
        {
            await taskGenerator().ConfigureAwait(false);
        }
        finally
        {
            if (!_disposed)
            {
                _semaphore.Release();
            }
        }
    }
}
